The Lewiston Tribune reports 50-year-old David C. Stone is scheduled to appear in District Court Wednesday afternoon for a change-of-plea hearing.
Stone and Anderson's estranged husband, 53-year-old Charles A. Capone, were both charged with first-degree murder, failure to notify a coroner or law enforcement officer about a death and conspiracy to commit both of those crimes.
A bond reduction motion filed Monday indicates Stone has reached an agreement that contemplates dismissing the first-degree murder charge and calling for him to plead guilty to failure to notify.
The prosecutor and public defender in the case declined to comment before the court hearing.
Capone's trial is set for March 31.